for the first time in nearly two years, apple stock price fell below $400. a drop in demand for ipod and iphone products led investors to sell off that stock. shares fell from an all-time high in september of $705 to close at $402 yesterday. >>> 4:52. coming up, realtime validation. why one bay area city wants to start counting cyclists. >> and the san francisco waterfront lit up to celebrate a new tenant. ,,,,,,,,,,,,,,,,,, >>> we have a pollen count today which favors mulberry, oak and grass. watch out. >> and we're still watching this breaking news in downtown san francisco. a lot of police on scene investigating something suspicious. we know the bomb squad is out there and they're telling people to avoid the intersection near 3rd and market. muni and bart may be impacted. much more coming up. >>> commuting in san francisco is about to get a little easier if you traveling by bicycle. the city is going to install its first realtime bike barometer on market street. the digital display counts the number of people in the bike lane at any given time. bike ridi